An extra-UI protocol, “feature codes” or “quick codes” generally referred to as Unstructured Supplementary Service Data (USSD) allows users to have access to hidden features in their mobile phones. However, this protocol was built only for mobile phones but it can as well be seen in CDMA devices.

This article is aimed at teaching you the secret and tricks of mobile phone codes which millions of phone users have no knowledge of. Thus, these mobile phone codes are secret codes that can help you perform certain tasks faster than ever expected.

mobile phone codes
Secret mobile phone codes you need to know

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Furthermore, these codes are secret because they are never displayed in the phone screen but the good news about them is that they are quite accessible and simple to use if you know them. All you need to do is to select them and click the dial pad of your phone.

The Importance Of Secret Mobile Phone Codes

For you to find out more about your phone or want to diagnose a problem, there are some codes you need know and use as well for easy and effective operation. These codes have secret information about your device. Interestingly,these codes are also useful to manufacturers as they frequently use them in their service centers. Meanwhile some of these secret mobile phone codes are freely available today for users.

Secret mobile phone codes are helpful to advanced mobile phone software developers and mobile phone testers for their frequent field tests. they also use the codes to enhance phone performance or for fault detection.

To know more about the components that could be diagnosed with the help of these codes, some of them are listed below:

  • Speaker
  • Earphone
  • Screen
  • Display
  • LED/ Illumination
  • Proximity Switch
  • Ambient Light Sensor
  • Keyboard & switch
  • Secondary Microphone
  • Vibrator
  • Camera
  • Front Camera
  • Bluetooth
  • WLAN
  • GPS
  • Compass
  • Accelerometer
  • Real Time Clock ( RTC)
  • Total Call Time
  • External Memory
  • Security
  • FM Radio Battery Status Check
  • Verify Certificates
  • SIM Card Test
  • USB Test
  • Flash LED Test
  • Earphone Mic Test

Secret mobile phone codes and the tricks you need to know

Below are the codes and their functions:

  1. Android code: *#*#34971539#*#*

Most smartphone users admire phones with good camera. Among the users, only few know how to check for a good camera with just a code. This code can enable one access every necessary information about a smartphone camera.

2. Caller ID Code: #31#

This code allows you hide your caller identity. It works in every phone whether android or any other type of phone. However, if you want to reinstate your caller ID, you can dial *31#

3. For every phone: *43#

This code enables you to activate your call waiting; you can as well deactivate it by entering #43#.

4. SMS Message Center: *5005*7672#

This code shows you your SMS message center number. So, the essence of this info is that you need know the center from which any SMS in your phone comes.

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5. Billing Cycle Code: *3282#

This code allows you access every necessary information about your billing circle. Hence, if you want to know anything about your bills just dial this code and the info will be displayed.

6. To Check Your Available Minutes: *646#

This code works only on postpaid plans. It is important here to know that this code does not work on iPhone, but it works on Galaxy phones. This is because according to research, Galaxy phone has an unlimited texting plan from AT&T. When I did it for the first time I was surprised as instead of it to display the info on a new screen, it sent a text message to my phone.

7. Code For Call Forwarding: *#61#

When I researched on this with my Galaxy phone, the code instigated a pop-up  that made me know long a call can stay prior to its forwarding to the message center. On the other hand, my iPhone, irrespective of carrier, the code provided me with same info as *#67# . My observation here however, is that for iPhone users, *#61# has the same function as *#67# . But it is not same with Galaxy phone users.

8. IMEI Code: *#06#

To view the IMEI number of your phone, enter this secret mobile phone code. However, it is my observation that this code does not work with Verizon on an iPhone. It can only work with the said device after switching to a T-Mobile SIM. It can also work with Android AT&T device.

The IMEI number is so unique and important to your device such that it can help “blacklist” stolen devices or even help with customer support.

9. To Check Your Call Forwarding: *#67#

Sometimes, when you are called by another person and you are busy or you reject the call, the call will be forwarded to another number. This secret mobile phone code allows you know the particular number the call is forwarded to.

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Mostly by default, it may be your carrier’s voicemail service. You can still change it to forward to a different number of your choice. For Android users, though it varies from system to system, click on the phone App>Hamburger icon>Settings>Call>More Settings>Call forwarding. But for iPhone, it can be changed by going to Settings>Phone>Call forwarding.

10. For Field Mode: *3001#12345#*

This is a secret mobile phone code that allows to access your “Field Mode” dial *3001#12345#*  This gives you access to info about cell towers and local networks.

Merits and Demerits of Using Secret Mobile Phone Codes

It is a settled fact that anything that has advantage has disadvantage as well. The essence of this is to let the user be aware of the fact that in as much the use of Secret Mobile Phone Codes is sweet, there are also some bitter parts of it and as such caution must be taken.

Merits:

  1. Every necessary information on both the software and hardware are readily available on the phone’s screen.
  2. The International Mobile Equipment Identity (IMEI) and the serial number can be validated without opening the phone. This is helpful if you want to network unlock your phone.
  3. You can test if the components mentioned above are fully functional.

Demerits:

  1. Battery check could drain the battery fully and in some cases may damage it altogether.
  2. As you are accessing the internal working of the phone and you can as well root your device which might negatively affect your phone warranty.

Finally, having enlisted and explained the above secret mobile phone codes and tricks, it’s my utmost belief that you can now access some features you never know of through the codes.

However, for comment and contribution, kindly make use of the comment box below.

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